Adding machine



y 1947- G. LILJESTROM EI'ALY ADDING MACHINE Filed April 12, 1944 3 Sheets-Sheet l- July 22, 1947.

G. LILJESTROM ETAL 2,424,359

ADDING MACHINE Filed April 12, 1944 s sheets-sheet:

G AI 041-55726 0V5 Kunssredm.

July 2, 1947- G. LILJESTRGM ET AL 2,424,359

ADDING MACHINE Filed April 12, 1944 v 3 Sheets-Sheet 3 Patented July 22, 1947 OFFICE ADDING MACHINE Gustaf Liljestriim and Ove Klingstn'im, Gothenburg, Sweden Application April 12, 1944, Serial No. 530,640 In Sweden March 29, 1943 9 Claims. 1

This invention relates to adding machines, cash registers and similar machines of the class in which the tens transfer operation takes place at the end of the cycle of the actuating shaft of the machine. In this class of machines the tens transfer mechanism must be restored at the commencement of the next cycle of the actuating shaft inasmuch as said restoration must be completed before a sub-total or total can be obtained. To accomplish this the actuating shaft has to perform an additional cycle. In case of power driven machines said additional cycle is accomplished, as a rule, by starting the machine manually, prior to the operation of the sub-total key or the total key, by depressing the key. This requires special attention on the part of the operator, rendering the operators work tedious.

The invention is particularly related to those machines of the class above referred to in which a pin carriage movable step-by-step is provided, the object of the invention being to provide in machines of this type a mechanism by which the additional cycle of the power shaft may be automatically controlled and the time of performing said additional cycle automatically determined.

To perform said additional cycle of the power shaft, said mechanism is independently controlled by means of two of the ordinary keys of the key-board of the machine, such for instance as the key and the Non-add key each of which, normally, initiates but a single cycle of the power shaft when depressed but which under ccrtainconditions may effect two cycles of the :power shaft. performed is determined by the pin carriage, inasmuch as the additional cycle will be obtained, when the pin carriage is in its starting position, while in every other position of the pin carriage the depression of any of the said keys will only initiate a single cycle of the power shaft. As soon as an item has been set up on the key-board and the pin carriage, as a result, is advanced one step at least from its starting position, the mechanism of the invention has been so operated that the depression of the key or the Nonadd key will initiate a single cycle of the power shaft, resulting in the performance of the functions forwhich said keys are especially provided. If, on the contrary,-the pin carriage is in its starting position, then it controls the mechanism of the invention in such a way as to cause two cycles of the power shaft to take place in immediate succession. In such case the depression of the key first initiates the addh When such two cycles are to be tional cycle of the power shaft during which the tens transfer mechanism is restored and the subtotal controlling means are opera-ted and thereafter another cycle resulting in a sub-total operation. Similarly, the depression of the Nonadd key first initiates the additional cycle of the power shaft during which the tens transfer mechanism is restored and the sub-total con trolling means are operated and thereafter another operation by which the total is obtained.

It is thus seen that in this case the key also acts as a sub-total key and the Non-add key also acts as a total key; consequently, only two operating keys are required to perform functions which have hitherto required four keys. At the same time the operation of the machine becomes less tedious and requires less attention on the part of the operator.

In the accompanying drawings an embodiment of the invention is shown as applied to an adding machine.

Fig. 1 is a diagrammaticfront view of the numeral keys and the pin carriage of the machine together with part of the mechanism of the invention in disabled state.

Fig. 2' is a similar view as that shown in Fig. 1, but with the mechanism of invention in operative position.

Fig. 3 is a side elevation of the operating keys of the machine and a longitudinal section of the frame supporting the operating keys.

Fig. 4 is a cross section taken on the line IV-IV of Fig. 3.

Fig. 5 is a side elevation of the frame of the operating keys with certain parts removed.

Figs. 6 and 7 show certain details of elements mounted in said frame, Fig. 6 being a side eleva tion and Fig. '7 a top view of said elements.

Figs. 816 are side elevations of the mechanism of the invention in different set positions.

Fig. 17 is a plan view with certain elements omitted illustrating the relative lateral mounting of various parts.

The drawings illustrate the invention as applied to an adding machine having ten numeral keys, five special operating keys and a pin carriage movable step-by-step crosswise of the machine. In the drawing, however, not the whole machine but only those parts thereof are shown, which are necessary for illustrating the invention. Thus, for instance, only a horizontal row of numeral keys, including three keys, are shown in Figs. 1 and 2. The five special operating keys are shown in Figs. 3 and 5, where their supporting bars are designated by the numerals 2, 3, 4, 5 and 3 6, respectively. 2 is the plug key key), 3 the minus key), 4 non-add key, 5 total key and 6 sub-total key. Only the key bars 2, 3 and 4 are provided with finger pieces 2, 3 and 4, respectively, the said last mentioned finger piece being, for reasons having nothing to do with the invention, provided with a separate supporting bar. The pin carriage is only diagrammatically indicated in Figs. 1 and 2, where it is designated by l. The pin carriage is provided with a transverse row of setting members 8, ten in number, which are adapted to be opearted by the numeral keys,

The operation of any of said setting members arivances the pin carriage one step to the left in the usual manner. The special operating keys are slidably mounted in a frame 9; normally each key is held in raised position by means ofa coil spring l9, Fig. l. At one lateral edge each special key is provided with a projection i l for cooperation with a locking rail l2 extending in the longitudinal direction of the machine. Said locking rail is slidably mounted in the frame and is acted on by a spring [3, Fig. 5, which tends to displace the rail to the left. For its cooperation with the several special keys the locking rail is provided with a set of stops or lugs l4, one for each special key, adapted to catch the projections l I of the respective keys when depressed in order to retain the keys in depressed position. Extending below the special keys parallel to the locking rail (2 is a starting lever is pivoted on the stud 19. On the other side of said stud [5, that is to say, behind the same, the starting lever carries an arm i! by means of which it may control an interrupter IS in the driving circuit of the machine. A spring [9 connected to said arm ll tends to maintain the starting lever in raised position in contact with the lower ends of the special keys. Screwed to the frame 9 opposite the locking rail 2 is a cover plate 25, Fig. 5. Mounted to turn on a pivot 22 attached to said cover plate is a lever 2!. A traction spring 23 tends to maintain said lever in its central position, as shown in Fig. 5. The shape andL arrangement of the lever will more clearly appear from Figs. 6 and 7. Formed in the lower end of the lever is a recess 24 the upper end, or bottom, of which is semi-circularly rounded. Pivoted to the lever 21, by means of pivots 21 and 28, are two pawls 25 and 23 of angular shape, each of which comprises a lower vertical arm and an upper horizontal arm. The lower arms are mounted on the pivots at their lower ends, and the upper arms are pointing towards each other and pressed by the action of springs 39 nd 3:, respectively, from opposite sides againts a pin 29 fastened to the lever 2 The recess 2 of the lever 2i is adapted to be n a y a pin 32 attached to a slidable block 33, Figs. 1 and 2, movable across the machine. Said slidable block is acted on by a spring 34 tending to move it towards the lever 2| in order to bring about the engagement between the pin and the recess 24. The slidable block is provided with a depending finger 35 situated in the path of a pin 33 by means of which a link 31 connected to the pin carriage l is pivoted to a control arm 39 mounted to turn on the shaft Said control arm is acted on by a spring 45 tending to turn the arm 39 so as to cause it to move the pin carriage to the left. By this means the pin carriage may control the cooperation of the pin 3-2 with the lever B! in such a Way, that in the nor mal or starting position of the pin carriage, Fig. 1, the slidable block 33 is held in its extreme right hand position in which the pin 32 is out of engagement with the recess 24 of the lever 2|, while in all other positions of the pin carriage the pin 32 is free to enter the recess 24 of lever 21 under the action of its spring 34, as shown in Fig. 2.

Slidably mounted in the frame 9 by the left hand side of the lever 2! is a longitudinally extending catch member 4! for the keys 5 and 6 having no finger pieces. Said catch member is cut from a piece of sheet metal, its outline, arrangement and operation appearing from Figs. 8-14. Adjacent its fore end-facing the operatorthe catch member is formed with a longitudinall extending slot e2 by means of which it is slidably mounted on a stationary shaft 43 extending in the transverse direction of the machine. Near the middle of the catch member there is another slot 44 opening into the upper edge of the member. Engaging said slot 44 is a stud 45 carried by the lever it. Near its rear end-remote from the operator-the catch member is provided with two upwardly extending hook shaped projections or lugs 48 and 41, the ends of which are facing each other. Formed in the catch between said lugs is a cam slot 48 opening in the upper edge of the catch member which is adapted to receive a pin 49 carried by a lever mounted on the shaft 43, as shown in Figs. 11-16. The pin 49 is wedge-shaped in cross-section for a purpose to be hereinafter set forth. A spring 5! acts on the catch member 4! to keep same in its uppermost position, and a spring 52 acts on the arm to turn same upwardly.

Mounted at the free end of the arm 53 adjacent the lower edge thereof by means of a stud 53 is a roller 54 adapted to be engaged by a pawl 55 attached to the main shaft 55 of the machine. The arm 59 carries at its upper edge, near its free end, an angularly bent lug 51 pointing to the left. Said lug is adapted to engage a radially projecting tooth 58, Fig. 5, on an arm 69 pivot-ally mounted on the stationary shaft 59 which bears against a roller 6| pivoted to the locking rail [2 at (-22. The pivot pin 62 extends through a longitudinally extending slot 63 in the cover plate 29 and supports the roller 6! on its end projecting beyond the right hand side of the cover plate.

The mechanism described operates as follows:

When the pin carriage 1 is in its normal position, as shown in Fig. 1, before an item has been set up on the keyboard, it maintains, through the medium of the elements 31, 36, 39, the slidable block 33 in its extreme right hand position, thereby keeping the stop pin 32 out of engagement with the recess 24 of lever 2|. As soon as an item is set up, the pin carriage is advanced one step to the left (Fi 2), allowing the stop pin 32 to enter the recess 24 and lock the lever 2| against turning on its pivot 22. The lever 2| is now in the position shown in Figs. 5, 8 and 9. If now the special operating key 2 for addition is depressed, the respective lug [4 of the locking rail 12 enters above the projection ll of the key depressed and locks the key in depressed position. The downward movement of the key turns the startin lever l5 downwardly and raises its rear arm 11, causin it to close the contacts l8 and start the motor. Evidently, whenever the special key 2' is held depressed, also the starting lever is held in its lower position and maintains the interrupter IS in closed state. The special key 2 controls when depressed a further action, since its lower end engages a rear projection 64 of the pawl 25 and turns the latter in a counter-clockwise direction against the action of spring 30, while tensioning the latter, Fig. 9. The tensioning oi spring 30, however, does not affect the lever 2|, because it is held against movement by the pin 32.

The motor when started rotates the main shaft 56 in clockwise direction from its normal position, shown in Fig. 11, to the position shown in Fig. 12 and back again. In the normal position, the pawl 55 bears on the roller 54, thereby keeping the arm 50 depressed. In this position the lug 51 of arm 50 is situated below tooth 58 of arm 60. On the rotation of the main shaft from its normal position the arm 50 is released from the pressure as exerted by the pawl 55 and is turned upwardly by its sprin 52, Fig. 12. In this tumin the lug 51 passes tooth 58 and turns arm 60 clockwise without bringing about any resulting function, During the returning of the main shaft to its normal position, the pawl 55 again comes to rest on the roller 54 and again depresses the arm 50 to the position shown in Fig. 11. During the said last mentioned movement the lug 51 engages the tooth 58 of arm 60 from above, Fig. 5, turns it in a counter-clockwise direction, and then again releases it. This will force the roller 6| to the right in the slot 53. The pivot pin 62 of said roller being attached to the locking rail l2, the latter also moves to the right. By this movement the special key 2 is disengaged from the respective stop M of locking rail 2 and immediately returned to normal by its spring Ill. The special key 2 releases the startin lever I5, which is now restored to normal by its spring I 9 and opens the interrupter I8. This causes the machine to stop after its actuating shaft has performed one cycle of operation. In the meantime the item set up in the selector has been transferred in usual way to the totalizer and printed on a strip of paper. It is thus seen that in this case the depression of the special key 2 has resulted in a regular adding operation.

Let it now be assumed, as an alternative, that the pin carriage is in normal position, Fig. 1, prior to the depression of the special key 2. As in the case above described the respective lug l4 of the locking rail l2 engages the projection ll of said key and maintains it in depressed position. As previously, the depression of the key 2 effects both a lowering of the starting lever |5 so that its arm I1 closes the interrupter 8 and starts the machine, anda turning of the pawl to the left with resulting tensioning of spring 30. In this case. the pin 32', however, is disengaged from the recess or notch 24 of lever 2|. Therefore, it cannot prevent a clockwise turning of the lever 2| under the influence of spring 30. This turning, however, is now counteracted by the pin 49 of arm 50 engaging the slot 48 of the catch member 4|, thereby preventing the latter and with it the stud 45 of lever 2| from mov in to the left.

During the operation of the machine from the starting position, as represented by Fig. 11, to the position, represented by Fig. 12, the pin 49 is raised out of engagement with the slot 48 in the manner already described. The catch member 4| is now free to be moved to the left under the influence of lever 2| and spring 30. The displacement being completed, the catch member is in the position shown in Fig. 10.

During the return stroke of the main shaft the pawl 55 is again brought into engagement with the roller 54 and lowers arm 50. The catch member being now in its left hand position, the slot 48 is not situated below pin 49 but to the left thereof so that the pin may now engage, by its sharp edge, a notch 65 formed in the upper edge of catch member 4| to the right of the slot 48 and lower the catch member, until it reaches the position shown in Fig. 14. Upon the displacement'of the catch member to the left above described, the right hand lug 41 thereof has entered above the projection ll of key 6. Thus, at the subsequent turning down of the catch member the key 6 has been depressed, as shown in Fig. 14. During the depressing stroke of key 6 the projection of key 6 acts on the oblique upper edge of the respective stop I 4 of the locking rail |2 forcing it to the right, this displacement being simultaneous with the similar displacement of rail |2 by elements 51, 58, 60. The rail now unlocks key 2 allowing it to return to normal under the action of its spring l0. As soon as the projection ll of key 6 has passed the respective stop I 4, the locking rail moves back and locks key 6 in depressed position. By this means the starting lever I5 is caused to remain in lowered position and keep the interrupter I8 closed, causing the machine to continue its operation, though by this time under the control of the subtotal key 6. While under control of key 6 the machine performs another cycle of operations, including subtotal taking, inasmuch as the key 6 is arranged, in a. way not illustrated, to control the movements necessary for subtotal taking.

When during this second cycle of operations the pawl 55 is moving from the normal position shown in Fig. 14 to the dead center position shown in Fig. 13, the arm is released and is again raised by its spring 52, allowing the catch member 4| to again rise under the influence of its spring 5|. At the same time the lever 2| is restored to its normal, or central, position by its spring 23. Due to the engagement between pin 45 of lever 2| and the slot 44, the catch member is displaced to the right into its starting position. This will again bring slot 48 right below pin 49. When during the return stroke of the main shaft from the position shown in Fig. 13 the pawl strikes the roller 54 and moves it downwardly, the pin 49 may thus enter the slot 48, thereby locking the catch member against displacement. During the return stroke of the main shaft the lug 5! acts on the tooth 5B of arm 60, Fig. 5, thereby turning said arm in a counterclockwise direction and displacing the roller 6| and the locking rail I2 to the left. The displacement of the locking rail releases key 6 allowing it to return to normal under the action of its spring Ill. The starting lever |5 being now released returns to its normal position, opening the interrupter !8. As a result, the machine is stopped after performing two successive cycles.

During the first cycle the tens transfer mechanism of the machine is set back to zero and the transfer and printing of the subtotal prepared. During the second cycle of operation the said lastmentioned operations are completed.

To accomplish these two cycles one manipulation only at the keyboard is required, that is, depression of the finger piece of the addition key 2, said finger piece in this case also serving as finger piece for the subtotal key 6.

In a similar manner to be hereinafter described the finger piece of the Non-add key also serves as finger piece for the total key 5 which has no finger piece of its own.

Let it first be assumed that key 3 be depressed, While the pin carriage is in the position shown in Fig. 2, that is to say, with the lever 2| locked 7 by the pin 32 so that it cannot turn. The key 4 depressed is caught by the respective stop H of the locking rail 12. The starting lever I is lowered by the key 4 and closes the interrupter 18, causing the machine to start. In addition, the key 4 when depressed operates a rear projection 66 of the pawl 26 pivoted to the lever 2i and turns said pawl in clockwise direction with resulting tensioning of spring 3| which thus obtains a tendency to turn the lever in clockwise direction. This operation, however, is prevented by the pin 32. During the rotation of the main shaft from its normal position, Fig. 11, to its dead center position,'Fig. 12, the arm 50 is raised by its spring 52. During the return movement of the main shaft from the dead center position, Fig. '12, to normal position, Fig. 11, the lug 51 engages the tooth 58 of arm 60, Fig. 5, and turns said arm in counterclockwise direction, thereby causing it to move the roller GI and the locking rail IE to the right. The locking rail now releases, by its respective stop [4, the key 4 allowing it to return to its normal position by means of its spring It). At the same time the starting lever I5 is released and returns to its normal position, opening the interrupter l8 to cause the machine to stop after it has completed a cycle of operations. During this cycle the item set up in the selector is printed on the paper strip but,

owing to the action of the key, not transferred to the totalizer. It is thus seen that a regular Non-add operation has been accomplished.

Let it now be assumed that the selector is in its normal position, Fig. 1, when the operating key is depressed. This means that the lever 2| is disengaged from the stop pin 32. As already described, the starting lever I5 is lowered to close the interrupter 18, so that the machine starts. Furthermore, the pawl 25 is turned counterclockwise tensioning the spring 3|. When during the first half cycle of the main shaft the pawl 55 is raised from the roller 54, the arm 50 is turned upwards by means of spring 52, and as soon as the pin 49 leaves the slot 48, the catch member 4! is released to be then moved to the right by means of the lever 2i when turned in clockwise direction by means of spring 3i. As a result of these operations the pin 49 is standing above a notch 61 formed in the upper edge of the catch 4! to the left of the slot 48. When during the return stroke of the main shaft the arm 59 moves down, said pin 49 will thus operate the catch member 4!, causing it to turn downwards on its pivot 43. The left hand lug 45 of the catch member 4! is caused by the displacement to the right of the catch member to engage from above the projection l l of key 5, so that the key 5 will be depressed by means of the catch 4| when turning downwards. When being depressed, the key 5 acts simultaneously on the slanting edge of the respective stop M of the locking rail [2 and displaces it to the right. This will release the key 4 which was hitherto locked in depressed position and, instead thereof, key 5 will now be locked in depressed state. The starting lever being maintained in lowered position by means of the depressed key 5 keeps the interrupter l8 closed so that the machine starts another cycle, though now under the control of key 5. Said key 5 has also, in well-known manner, operated the means for controlling the movements required in taking a total. During the first portion of said other cycle the pawl 55 of the main shaft 56 moves from the position shown in Fig. 16 to the position shown in Fig. 15. In the meantime the sp1-ing52;raises the arm to its normal position. The pin 49 is disengaged from the notch'B'l, thereby releasing the catch member 4! and allowing spring 3| to restore the pawl 26 and the catch member M to their normal positions. This will again bring the slot 48 right below the pin 49, so that when the pawl during the return stroke of the main shaft, strikes the roller 54 and forces the arm 53 downwards, the pin 49 will enter the slot 48 without affecting the catch member in any way. Upon the restoration of the catch member to its normal position the left hand lug 46 thereof is disengaged from the projection H of key 5.

During the lowering of arm 50 the lug 51 strikes the tooth 58 ofarm 60, Fig. 5, and turns said arm in counterclockwise direction, causing it to displace the roller 51 and the locking rail 12 to the right. The key 5 is now released and restored to normal position by means of its spring l0. At thesame time the starting lever I5 is allowed to return to its normal position under the influence of spring 17, thereby opening the interrupter l8 so as to stop the machine.

In this case the tens transfer mechanism has been set back to zero and a preliminary setting of certain means for obtaining a total has taken place during the first cycle of operations. Duringt-he second cycle the total is taken by completing the setting prepared in the first cycle.

What we claim is:

1. In a machine of the class specified, the combination of a power driven shaft, 9. pin carriage, numeral keys to set up numbers on said carriage and advance it step by step from its normal position, operating keys adapted to initiate their normal functions with the pin carriage in the off-normal positions, other operating keys the depression of which should be preceded by an extra cycle of the power shaft, a catch member selectively settable to engagement with said other operating keys under the control of said firstmentioned operating keys with the pin carriage in its normal position, and means operable by the power shaft and adapted in the course of a cycle initiated by any of said first-mentioned operating keys with the pin carriage in its normal position to cause said catch member to depress a corresponding one of said other operating keys for initiating a succeeding cycle.

2. In a machine of the class specified, in which the tens transfer operations take place at the end of the operating cycle of the machine, and in which the tens transfer mechanism is restored prior to the performance of the total and subtotal taking functions of the machine, the combination of a pin carriage, numeral keys to set up numbers on said pin carriage and move it step by step from its normal position, a total key, a subtotal key, other operating keys to initiate other certain functions, a catch member selectively settable to engagement with said total and subtotal keys under the control of said other operating keys with the pin carriage in its normal position, a power shaft, and means operable by the power shaft and adapted in the course of a cycle initiated by any of said other operating keys with the pin carriage in its normal position to cause said catch member to depress the total or subtotal key for initiating a succeeding total or subtotal cycle.

3. In a machine of the class specified, the combination of a power driven shaft, a pin carriage, numeral keys to set up numbers on said carriage and advance it step by step from its normal posi-- tion, operating keys adapted to initiate their normal functions with the pin carriage in the elf-normal positions, other operating keys the depression of which should be preceded by an extra cycle of the power shaft, a catch member settable under the control of said first-mentioned operating keys with the pin carriage in its normal position to various operative positions for engaging an individual one of said other operating keys in each such position, means to lock said catch member against setting with the pin carriagein the off-normal positions, and means operable by the power shaft and adapted-when operated in the course of a cycle initiated byany of said first-mentioned operating keys with the pin carriage in its normal position to causesaid catch member to depress a corresponding one of said other operating keys for initiating a succeeding cycle.

4. In a machine of the class specified, the combination of a power driven shaft, a pin carriage, numeral keys to set up numbers on said carriage and advance it step by step from its normal position, a total key and a subtotal key, the depression of which must be preceded by an extra cycle of the power shaft, other operating keys adapted to initiate their normal functions with the pin carriage in the off-normal positions, a catch member settable under the control of said last-mentioned operating keys with the pin carriage in its normal position to various operative positions for engaging the total key in one operative position and the subtotal key in another operative position, and means operable by the power shaft during the last portion of each cycle thereof and adapted when operated in the course of a cycle initiated by any of said other operating keys with the pin carriage in its normal position to cause the catch member to depress the total or subtotal key for initiating a total or subtotal cycle succeeding said first-mentioned cycle.

5. In a machine of the class specified, the cmbination of a power driven shaft, a pin carriage, numeral keys to set up numbers thereon and move it step by step from its normal position, operating keys to initiate their normal functions with the pin carriage in the elf-normal positions, other operating keys the depression of each of which must be preceded by an extra cycle of the power shaft of the machine, a slidably and pivotally mounted catch member settable to various operations positions and adapted to engage a different one of said other operating keys in each operative position, means operable by said first-mentioned operating keys to set the catch member to its operative positions by imparting a sliding movement thereto, means to prevent setting of the catch member with the pin carriage in its normal position, a pivoted means operable by an arm on the power shaft to impart a swinging motion to the catch member in the operative positions thereof to cause the catch member in the course of a cycle initiated by the depression of any of said first-mentioned operating keys with the pin carriage in its normal position to depress a corresponding one of said other operating keys for initiating a, succeeding cycle.

6. In a machine of the class specified, the combination of numeral keys, a subtotal key, a total key and other special operating keys, at power driven shaft, a catch means settable by said operating keys from its normal position to various operative positions and adapted when in one operative position to engage the subtotal key operative position to engage the total key, means operable by the power shaft to cause saidcatch member to depress the key engaged thereby, and a, step-by-step movable pin carriage adapted to be advancedone step upon each 'depressionof a numeral key and to lock the catch-means in its normal position, whenever the pin carriage is out of its normal position.

'7. In a machine of the class specified, the combination of numeral keys, a pin carriage adapted to be advanced one step upon each depression of a numeral key, a subtotal key, a total key and other special operating keys, a power driven shaft,-a slidably and pivotally n' ounte'd catch member for engaging the subtotal key in one operative position and the total'key in another operative position, means under said special keys to set the catch member to or retract it from its operative positions by a sliding movement, means operable by the power shaft in the course of a cycle initiated by any of said special keys to cause the catch member to swing when thus set while depressing the total or subtotal key engaged thereby, and means adapted to be controlled by the pin carriage for lockin said member against turning when the pin carriage is out of its normal position and to unlock it when the pin carriage is in its normal position.

8. In a machine of the class specified,.the combination of a pin carriage, numeral keys to set up members thereon and impart a stepwise movement thereto, a subtotal key, a total key and other special operating keys, a power driven shaft, a slidably and pivotally mounted catch member settable to an operative position for, engaging the subtotal key and to another 0perative position for engaging the total key, a pivotally mounted member to set said catch member by imparting a sliding motion thereto by and when in another turning on its pivot, spring-loaded elements on said pivotally mounted member to efiect the turning thereof under the control of said other special keys, an arm mounted to turn on the pivot of the catch lever for efiecting a, swinging movement thereof under the control of the power shaft, a projection on said pivotally mounted member to engage a slot in the catch member for eifecting the displacement without preventing the swinging movement thereof, a projection on said arm for imparting the swinging movement to the catch member, the catch member having a slot concentric with its pivot to receive said projection in its normal position to allow the arm to swing without imparting any movement to the catch member, the catch member having incisions to the sides of said slot to be engaged by the projection in the operative positions of the catch member for transmitting a swinging motion thereto and to the key engaged thereby.

9. In a machine of the class specified, the combination of a pin carriage, numeral keys to set up numbers on said pin carriage and impart a stepwise movement thereto, a total key, a subtotal key and other operating keys, a slidable rail for locking the total, subtotal and special keys in depressed position, a power driven shaft, an interrupter for controlling the operation of said shaft, a lever adapted to be operated by said total, subtotal and special keys for controlling said interrupter, a slidably and pivotally mounted catch member for engaging the subtotal and total keys in separate operative positions, a, pivotally mounted lever operable by spethe control of }inglthe catch member against movement in the normal position thereof, another arm fastened to.,-the1power shaft to operate said first-mentionedarm, and means on said. first-mentioned armlfor releasin'g said locking rail and restor- 15 ing it to normal position.

GUSTAE LILJES'I'RCSM. OVE KLINGSTRM.

REFERENCES CITED The following references are of record in the Number file of this patent: v

UNITED STATES PATENTS Name Date Peters Jan. 7, 1913 Sundstrand May 4, 1926 Sundstrand July 10, 1934 Butler Feb. 19, 1935 Breitling Aug. 25, 1936 Gebhardt Nov. 16, 1937 Neueiter et a1. Oct. 17, 1939 Marquess Jan. 12, 1943 Anderson June 1, 1943 

